96 COMPOSITE. Eupatorium. 



cillatum, Mulil. in Willd. Spec, iii. 760. E. ternifolium, Ell. Sk. ii. 306 ; DC. Prodr. v. 151. 

 Low or wet ground, New Brunswick to Saskatchewan, Florida, and westward in wooded 

 districts to New Mexico, Utah, and Brit. Columbia. Varies greatly, yet manifestly one 

 species. The typical form, very tall, growing in shady places, with smooth stem (usually 

 purple above the nodes), large and thin leaves and loose inflorescence, its branches sleuder- 

 peduncled. A narrow-leaved and attenuated form (var. angustifolium, Torr. & Gray, 1. c.) is 

 E.falcatum, Michx. Fl. ii. 99, and E. lievitjatum, Torr. Cat. PI. N. Y. The best marked of 

 the variations are the following. 



Var. maculatum, DARL. Common in open ground, 3 or 4 feet high, often roughish- 

 pubescent : stem commonly purple, striate or sulcate ; leaves somewhat rugose, 3-5-uate : in- 

 florescence more compact and depressed. Fl. Cest. 453 ; Torr. & Gray, I.e. E. maculatum, 

 L. l..c. E. fusco-rulr/tm, Walt. Car. 199 ? E. punctatum, Willd. Enum. ii. 853. E. dubiuin, 

 Poir. Suppl. ii. 606. The most widely distributed form. 



Var. amtienum. Leaves opposite or at most 3-4-nate, ovate or oblong, smoothish : 

 stem slender, 2 feet high : heads fewer and only 3-5-flowered. E. amvnum, Pursh, Fl. ii. 

 514. An attenuate or depauperate form, growing in rather dry woods, mountains of Vir- 

 ginia to New York. 



* * Involucre imbricated, rather lax; the bracts of at least three or seldom only two lengths, the 

 outer successively shorter. Subimbricata, DC. 



-) Heads as many as 20-flowered, large (about half-inch long): bracts of the involucre of 4 or 5 

 lengths, striate-nervose in the way of rick t Ilia: perennial herbs, of a Mexican type. 



H- Leaves entire, tomentose beneath. 



E. Bigelovii, GRAY. Cinereous-pubescent, paniculately branched: leaves all opposite, 

 ovate-lanceolate with a rounded or obscurely cordate base, acute, entire, short -petioled, 

 puberulent above, soft-tomentose beneath, 3-5-ribbed at base : inflorescence somewhat pa- 

 niculate: peduncles 3-5-cephalous : involucre turbiuate, tomentulose, regularly imbricated ; 

 outer bracts ovate-lanceolate, acute, coriaceous, the innermost linear : flowers purplish : 

 akenes nearly glabrous. Bot. Mex. Bound. 75. Arizona, on the Gila, Bigelow. 



H- -H- Leaves acutely serrate, narrowed at the pinnately veined base, very short-petioled. 



E. Bruneri. Minutely puberulent, apparently only a foot or two high : leaves opposite, 

 ovate-oblong, acute, loosely veiny (2 or 3 inches long) : paniculate rather slender peduncles 

 bearing 3 or more sessile or short-peduncled heads : involucre campauulate, of comparatively 

 few obscurely striate obtuse bracts ; the outer oval, puberulent ; inner ones scarious and 

 glabrous, flesh-color (as probably are the flowers) : akenes glabrous. Damp ground, in the 

 Rocky Mountains at Fort Collins, N. Colorado, Dr. Brunei- . 



-H- -H- -H- Leaves coarsely and often obtusely dentate, 3-5-ribbed at the cordate or sometimes trun- 

 cate dilated base, slender-pstioled, thin, bright greeen, acute or acuminate: flowers white or 

 whitish: bracts of the campanulate involucre conspicuously striate-nerved: akenes minutely 

 pubescent, not rarely 6-uerved, or with one or two of the nerves double ! 



E. Fendleri, GRAY. A foot or two high, leafy, obscurely puberulent : leaves opposite or 

 the upper alternate, deltoid-subcordate, tapering gradually to an acute or acuminate point : 

 heads comparatively small and numerous, paniculate, all peduucled : bracts of the involucre 

 all obtuse, the outer oblong. Proc. Am. Acad. xvii. 205. BricJceHia Fend/eri, Gray, PI. 

 Fendl. 63, & PI. Wright, ii. 73. (Some secondary or double ribs on many of the akenes 

 connect this with Brickellia.) Mountains of New Mexico and Arizona, Fendler, Wrlyht, 

 Greene, Lemmon, Ruxby. 



E. Parryi, GRAY. Hirsutely pubescent (the spreading hairs of the stem somewhat glandular 

 and viscid), loosely branched : leaves (so far as known) alternate, broadly ovate and rather 

 deeply cordate, crenately dentate : heads rather few and large in an open naked panicle, 

 slender-pedunculate : bracts of the involucre thin, oblong-lanceolate, acuminate, the inner- 

 most produced into a setiform tip. Bot. Mex. Bound. 75. Sierra de Carmel, S. border of 

 Texas, on the Mexican side of the Rio Grande, Parry. (Mex.) 



) -1 Heads 3-9-flowered, small (only 2 or 3 lines long), paniculate: leaves (at least the lower) 

 pinnately dissected, many of them alternate : involucral bracts 6 to 10, narrow, acute or abruptly 

 pointed, narrowly scarious-margined, nerveless: flowers white or whitish: herbs very leafy, 

 much branched, with habit of Cumjza and Artemisia. 



